Modifing shipping options avaible to customer by catigories in shopping cart

[Beau91324]

We are using the latest version of the USPS shipping module, and it is working quite well but we have run into a problem with Media Mail and Priority mail. Usually our products are shipped via Priority Mail but some of them can be shipped with Media Mail. The media Mail eligible products are all in their own categories so I'd like to be able to have some way of getting ZenCart to check to see if the shopping cart is filled with only those categories and if it is give the customer the option of selecting Media Mail. I really don't want to dive into the USPS Module code and make the changes code if someone has already worked out how to do this.

Thanks

[Phil S]

I needed something along those lines and received quite a bit of help in this thread;
http://www.zen-cart.com/showthread.p...14-Issue/page2

With a little tweaking, I think the solution would work for you as well.

[Ajeh]

To control when Media mail is available for when the shopping cart contains only Products from specific master_categories_id you can edit the module:
/includes/modules/shipping/usps.php

and add to code in RED around line 370:

// eof: example to block USPS Priority MailTM Small Flat Rate Box when anything from master_categories_id 12 or 15 are in the cart

// bof: Media for specific master_categories_id
  $media_categories = 0;
  $media_categories += $_SESSION['cart']->in_cart_check('master_categories_id','10');
  $media_categories += $_SESSION['cart']->in_cart_check('master_categories_id','12');
  if ($_SESSION['cart']->count_contents() != $media_categories) {
    $skip_media = true;
  } else {
    $skip_media = false;
  }
// bof: Media for specific master_categories_id

      for ($i=0; $i<$PackageSize; $i++) {

and the code around line 629 in RED:

//echo '<br />USPS info: ' . '<br />$type: ' . $type . '<br />$type_rebuilt: ' . $type_rebuilt . '<br />$title: ' . $title . ' $cost: ' . $cost . '<br />';

// bof: Media for specific master_categories_id
          if ($skip_media && preg_match('#MEDIA#i', $type)) {
            continue;
          }
// eof: Media for specific master_categories_id

          if ($this->usps_countries == 'US' && MODULE_SHIPPING_USPS_FIRST_CLASS_FILTER_US == 'True' && preg_match('#First\-Class#i', $type) && $cnt_first > 1) continue;

Just change or add the master_categories_id for:

  $media_categories += $_SESSION['cart']->in_cart_check('master_categories_id','10');

to the ones you need and add additional ones if needed ...